Method for terminal transmitting uplink control channel in wireless communication system, and communication device using same

ABSTRACT

Provided are a method for a terminal transmitting an uplink control channel in a wireless communication system, and a device using same. The method comprises: determining the overlapping or not between a first physical uplink control channel (PUCCH) and a second PUCCH; and determining a transmission method for the first PUCCH and the second PUCCH on the basis of the determining. Here, the first PUCCH is an uplink control channel that is frequency division multiplexed (FDM) with a data channel, and the second PUCCH is an uplink control channel that is time division multiplexed (TDM) with the data channel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International ApplicationPCT/KR2018/000363, filed on Jan. 8, 2018, which claims the benefit ofU.S. Provisional Patent Applications No. 62/443,648, filed on Jan. 7,2017, U.S. Provisional Patent Applications No. 62/444,342, filed on Jan.9, 2017, and U.S. Provisional Patent Applications No. 62/446,418, filedon Jan. 14, 2017. The disclosures of the prior applications areincorporated by reference in their entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to wireless communication and, moreparticularly, to a method for transmitting uplink control channel in awireless communication system performed by a terminal and acommunication apparatus using the method.

Related Art

As more communication devices have demanded higher communicationcapacity, there has been increasing necessity for enhanced mobilebroadband communication relative to the conventional radio accesstechnology (RAT). In addition, the massive machine type communication(MTC) is also one of the main issues to be considered in the nextgeneration communication, which provides various services irrespectiveof time and place by connecting a plurality of devices and objects toeach other.

Further, a communication system design in which a service or a UEsensitive to reliability and latency is considered has been underdiscussion. The next generation radio access technology taking intoconsideration of enhanced mobile broadband communication, massive MTC,ultra-reliable and low-latency communication (URLLC), and the like maybe referred to as a new radio access technology (RAT) or new radio (NR).

Meanwhile, in NR, different from the conventional communication system,uplink control channels of different multiple types may be introduced.For example, there may be an uplink control channel through which theamount of transmittable information is relatively limited but the amountof information to be used is also small and an uplink control channelthrough which the amount of transmittable information is relativelygreat and the amount of supported information to be used is also great.In addition, transmission timings after receiving data of the uplinkcontrol channels of different types may be differently configured.

In NR, in the case that collision or overlap occurs between uplinkcontrol channels of different multiple types or the uplink controlchannels and data channel or sound reference signal (SRS), and the like,it becomes problematic on how to deal with it.

SUMMARY OF THE INVENTION

The present invention provides a method for transmitting uplink controlchannel in a wireless communication system performed by a terminal and acommunication apparatus using the method.

In one aspect, provided is a method for transmitting uplink controlchannel performed by a user equipment. The method includes determiningwhether a first physical uplink control channel (PUCCH) and a secondPUCCH are overlapped and deciding a transmission technique of the firstPUCCH and the second PUCCH based on the determination. The first PUCCHis an uplink control channel which is frequency division multiplexing(FDM) with a data channel, and the second PUCCH is an uplink controlchannel which is time division multiplexing (TDM) with the data channel.

The method may further include receiving a downlink grant, whereinwhether to piggyback the second PUCCH to the first PUCCH is decidedbased on a time gap between a reception timing of the downlink grant anda transmission timing of the second PUCCH.

When the first PUCCH and the second PUCCH are overlapped, a resource ofthe first PUCCH which is overlapped may be punctured.

When a resource assigned to the first PUCCH is M (M is a natural numberof 1 or more) resource blocks and the resource overlapped with thesecond PUCCH is K (K is a natural number of 1 or more) resource blocksamong the M resource blocks in a frequency domain, discrete Fouriertransform (DFT) corresponding to a size of the M resource blocks may beperformed in a symbol of a time domain on which the overlap is notoccurred, and DFT corresponding to a size of the M-K resource blocks maybe performed in a symbol of a time domain on which the overlap isoccurred.

When the second PUCCH and the data channel are overlapped, a symbolpunctured in the data channel may be differently decided according tothe symbol on which the second PUCCH is located.

When the first PUCCH and the second PUCCH are overlapped, the firstPUCCH transmission may be dropped.

When the first PUCCH and the second PUCCH are overlapped, only theregion of the first PUCCH may be not transmitted.

When the first PUCCH and the second PUCCH are overlapped, the region ofthe first PUCCH which is overlapped may be transmitted by reducingtransmission power.

A modulation scheme of a preconfigured modulator order or less may beused in the first PUCCH.

When a modulation scheme of a modulation order which is greater than apreconfigured modulator order is used in the first PUCCH, an additionreference signal may be transmitted in the first PUCCH which isoverlapped.

The first PUCCH may be transmitted on multiple slots.

A reference signal of a same structure may be transmitted in each of theslots.

When the first PUCCH and the second PUCCH are overlapped, only the firstPUCCH on the slot in which the overlap occurs may be not transmitted.

When the first PUCCH and the second PUCCH are overlapped, the firstPUCCH may be not transmitted on all the multiple slots.

In another aspect, provided is a communication apparatus. Thecommunication apparatus includes a transceiver configured to transmitand receive a wireless signal and a processor configured to operate withbeing connected to the transceiver. The processor is configured to:determine whether a first physical uplink control channel (PUCCH) and asecond PUCCH are overlapped, and decide a transmission technique of thefirst PUCCH and the second PUCCH based on the determination, wherein thefirst PUCCH is an uplink control channel which is frequency divisionmultiplexing (FDM) with a data channel, and the second PUCCH is anuplink control channel which is time division multiplexing (TDM) withthe data channel.

According to the present invention, in NR in which uplink controlchannels of different types are introduced, in the case that collisionor overlap occurs between uplink control channels, or collision oroverlap occurs between each of the uplink control channels and datachannel or SRS, and the like, a method of dealing with it is regulated,and accordingly, it may be prevented occurrence of ambiguity in uplinkcontrol channel transmission.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a wireless communication system to which the presentinvention can be applied.

FIG. 2 is a block diagram showing the structure of a radio protocol onthe user plane.

FIG. 3 is a block diagram showing the structure of a radio protocol onthe control plane.

FIG. 4 illustrates system architecture of a next-generation radio accessnetwork (NG-RAN) to which NR is applied.

FIG. 5 illustrates function division between the NG-RAN and the 5GC.

FIG. 6 shows an example of the frame structure for the new radio accesstechnology.

FIG. 7 illustrates an example of UL control channel multiplexing in NR.

FIG. 8 illustrates LGD_PUCCH and SHD_PUCCH.

FIG. 9 illustrates the case that the LGD_PUCCH and the SHD_PUCCH areoverlapped.

FIG. 10 illustrates a method for transmitting UL control channelaccording to an embodiment of the present invention.

FIG. 11 illustrates a method for transmitting UL control channelaccording to proposed method #1-1.

FIG. 12 illustrates an example of performing DFT of UL control channel.

FIG. 13 illustrates a first example of puncturing the PUSCH according toa symbol position of the SHD_PUCCH in the case that he PUSCH and theSHD_PUCCH are “overlapped” on the same slot.

FIG. 14 illustrates a second example of puncturing the PUSCH accordingto a symbol position of the SHD_PUCCH in the case that he PUSCH and theSHD_PUCCH are “overlapped” on the same slot.

FIG. 15 illustrates a method according to proposed method #1-3.

FIG. 16 illustrates a power control method for UL control channel.

FIG. 17 illustrates a multiple slot LGD_PUCCH which may be introduced inNR.

FIG. 18 is a block diagram illustrating a communication apparatus inwhich the embodiment of the present invention is implemented.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 shows a wireless communication system to which the presentinvention can be applied. The wireless communication system may also bereferred to as an evolved-UMTS terrestrial radio access network(E-UTRAN) or a long term evolution (LTE)/LTE-A system.

The E-UTRAN includes at least one base station (BS) 20 which provides acontrol plane and a user plane to a user equipment (UE) 10. The UE 10may be fixed or mobile, and may be referred to as another terminology,such as a mobile station (MS), a user terminal (UT), a subscriberstation (SS), a mobile terminal (MT), a wireless device, etc. The BS 20is generally a fixed station that communicates with the UE 10 and may bereferred to as another terminology, such as an evolved node-B (eNB), abase transceiver system (BTS), an access point, etc.

The BSs 20 are interconnected by means of an X2 interface. The BSs 20are also connected by means of an S1 interface to an evolved packet core(EPC) 30, more specifically, to a mobility management entity (MME)through S1-MME and to a serving gateway (S-GW) through S1-U.

The EPC 30 includes an MME, an S-GW, and a packet data network-gateway(P-GW). The MME has access information of the UE or capabilityinformation of the UE, and such information is generally used formobility management of the UE. The S-GW is a gateway having an E-UTRANas an end point. The P-GW is a gateway having a PDN as an end point.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (L1), a second layer (L2), and a thirdlayer (L3) based on the lower three layers of the open systeminterconnection (OSI) model that is well-known in the communicationsystem. Among them, a physical (PHY) layer belonging to the first layerprovides an information transfer service by using a physical channel,and a radio resource control (RRC) layer belonging to the third layerserves to control a radio resource between the UE and the network. Forthis, the RRC layer exchanges an RRC message between the UE and the BS.

FIG. 2 is a diagram showing a wireless protocol architecture for a userplane. FIG. 3 is a diagram showing a wireless protocol architecture fora control plane. The user plane is a protocol stack for user datatransmission. The control plane is a protocol stack for control signaltransmission.

Referring to FIGS. 2 and 3, a PHY layer provides an upper layer with aninformation transfer service through a physical channel. The PHY layeris connected to a medium access control (MAC) layer which is an upperlayer of the PHY layer through a transport channel. Data is transferredbetween the MAC layer and the PHY layer through the transport channel.The transport channel is classified according to how and with whatcharacteristics data is transferred through a radio interface.

Data is moved between different PHY layers, that is, the PHY layers of atransmitter and a receiver, through a physical channel. The physicalchannel may be modulated according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme, and use the time and frequency as radioresources.

The functions of the MAC layer include mapping between a logical channeland a transport channel and multiplexing and demultiplexing to atransport block that is provided through a physical channel on thetransport channel of a MAC Service Data Unit (SDU) that belongs to alogical channel. The MAC layer provides service to a Radio Link Control(RLC) layer through the logical channel.

The functions of the RLC layer include the concatenation, segmentation,and reassembly of an RLC SDU. In order to guarantee various types ofQuality of Service (QoS) required by a Radio Bearer (RB), the RLC layerprovides three types of operation mode: Transparent Mode (TM),Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provideserror correction through an Automatic Repeat Request (ARQ).

The RRC layer is defined only on the control plane. The RRC layer isrelated to the configuration, reconfiguration, and release of radiobearers, and is responsible for control of logical channels, transportchannels, and PHY channels. An RB means a logical route that is providedby the first layer (PHY layer) and the second layers (MAC layer, the RLClayer, and the PDCP layer) in order to transfer data between UE and anetwork.

The function of a Packet Data Convergence Protocol (PDCP) layer on theuser plane includes the transfer of user data and header compression andciphering. The function of the PDCP layer on the user plane furtherincludes the transfer and encryption/integrity protection of controlplane data.

What an RB is configured means a process of defining the characteristicsof a wireless protocol layer and channels in order to provide specificservice and configuring each detailed parameter and operating method. AnRB can be divided into two types of a Signaling RB (SRB) and a Data RB(DRB). The SRB is used as a passage through which an RRC message istransmitted on the control plane, and the DRB is used as a passagethrough which user data is transmitted on the user plane.

If RRC connection is established between the RRC layer of UE and the RRClayer of an E-UTRAN, the UE is in the RRC connected state. If not, theUE is in the RRC idle state.

A downlink transport channel through which data is transmitted from anetwork to UE includes a broadcast channel (BCH) through which systeminformation is transmitted and a downlink shared channel (SCH) throughwhich user traffic or control messages are transmitted. Traffic or acontrol message for downlink multicast or broadcast service may betransmitted through the downlink SCH, or may be transmitted through anadditional downlink multicast channel (MCH). Meanwhile, an uplinktransport channel through which data is transmitted from UE to a networkincludes a random access channel (RACH) through which an initial controlmessage is transmitted and an uplink shared channel (SCH) through whichuser traffic or control messages are transmitted.

Logical channels that are placed over the transport channel and that aremapped to the transport channel include a broadcast control channel(BCCH), a paging control channel (PCCH), a common control channel(CCCH), a multicast control channel (MCCH), and a multicast trafficchannel (MTCH).

The physical channel includes several OFDM symbols in the time domainand several subcarriers in the frequency domain. One subframe includes aplurality of OFDM symbols in the time domain. An RB is a resourcesallocation unit, and includes a plurality of OFDM symbols and aplurality of subcarriers. Furthermore, each subframe may use specificsubcarriers of specific OFDM symbols (e.g., the first OFDM symbol) ofthe corresponding subframe for a physical downlink control channel(PDCCH), that is, an L1/L2 control channel. A Transmission Time Interval(TTI) is a unit time for subframe transmission.

Hereinafter, new radio access technology (new RAT) will be described.

As more communication devices have demanded higher communicationcapacity, there has been increasing necessity for enhanced mobilebroadband communication relative to the conventional radio accesstechnology (RAT). In addition, the massive machine type communication(MTC) is also one of the main issues to be considered in the nextgeneration communication, which provides various services irrespectiveof time and place by connecting a plurality of devices and objects toeach other. Further, a communication system design in which service/UEsensitive to reliability and latency is considered has been underdiscussion. An introduction of the next generation radio accesstechnology has been discussed, which takes into consideration ofenhanced mobile broadband communication, massive MTC, ultra-reliable andlow-latency communication (URLLC), and the like, and the correspondingtechnology is referred to as new RAT or NR, for the convenience ofdescription.

FIG. 4 illustrates system architecture of a next-generation radio accessnetwork (NG-RAN) to which NR is applied.

Referring to FIG. 4, the NG-RAN may include a gNB and/or an eNB whichprovides a UE with user plane and control plane protocol termination.FIG. 4 illustrates a case where only eNB is included. The gNBs and theeNBs are interconnected through an Xn interface. The gNB and the eNB areconnected to a 5G core network (5GC) through NG interfaces. Morespecifically, the gNB and the eNB are connected to an access andmobility management function (AMF) through an NG-C interface andconnected to a user plane function (UPF) through an NG-U interface.

FIG. 5 illustrates function division between the NG-RAN and the 5GC.

Referring to FIG. 5, a gNB may provide functions of inter-cell radioresource management (inter cell RRM), RB control, connection mobilitycontrol, radio admission control, measurement configuration & provision,dynamic resource allocation, and the like. The AMF may provide functionsof NAS security, idle state mobility processing, and the like. The UPFmay provide functions of mobility anchoring, PDU processing, and thelike. A session management function (SMF) may provide functions of UE IPaddress allocation, PDU session control, and the like.

In the NR, the following technical/characteristic may be applied.

<Self-Contained Subframe Structure>

FIG. 6 shows an example of the frame structure for the new radio accesstechnology.

In the NR, a structure in which a control channel and a data channel aretime division multiplexing (TDM) in one TTI, as shown in FIG. 6, may beconsidered as one of frame structures to minimize latency.

In FIG. 6, the shadow area represents downlink control region and thedark area represents uplink control region. The remaining area may alsobe used for downlink (DL) data transmission or uplink (UL) datatransmission. The structure is characterized in that, the DLtransmission and UL transmission are sequentially performed in asubframe, therefore may send DL data and receive UL ACK/NACK even in asubframe. Consequently, the time consumed until data retransmission isreduced when data transmission error occurs, thereby minimizing thelatency of the final data transmission.

In such a self-contained subframe structure, a time gap may be requiredfor the switching process from a transmission mode to a reception modeor the switching process from a reception mode to a transmission modebetween an eNB and a UE. For this reason, a part of OFDM symbol on thetime of switching from DL to UL may be set as a gourd period (GP) in theself-contained the subframe structure.

Meanwhile, in relation to uplink in NR, the following techniques may beapplied.

<PUCCH Format in NR>

In NR, a PUCCH may be used for transmitting uplink control information(UCI). The PUCCH format may be distinguished by duration/payload size.For example, the PUCCH format may be distinguished into “SHORT DURATIONUPLINK CONTROL CHANNEL (SHD_PUCCH)” and “LONG DURATION UPLINK CONTROLCHANNEL (LGD_PUCCH)”. The SHD_PUCCH may be referred to as a short PUCCHfor the convenience of description, format 0 (≤≤2 bits) and format 2 (>2bits) may correspond thereto. The LGD_PUCCH may be referred to as a longPUCCH, and the long PUCCH may correspond to format 1 (≤≤2 bits), format3 (>2, [>N] bits) and format 4 (>2, [≤≤N] bits).

Meanwhile, the transport diversity technique for a PUCCH may not besupported in LTE Rel-15. In addition, a simultaneous transmission of aPUSCH and a PUCCH of a UE may also not be supported in LTE Rel-15.

The PUCCH format in NR may be defined as represented in Table 1 below.

TABLE 1 PUCCH length (Number of OFDM Number Format symbols of bits Useexample Note 0 1-2  ≤2 HARQ, SR Sequence selection 1 4-14 ≤2 HARQ, [SR]Sequence modulation (BPSK, QPSK) 2 1-2  >2 HARQ, CSI, [CP-OFDM] [SR] 34-14 [>N] HARQ, CSI, DFT-s-OFDM (no UE [SR] multiplexing) 4 4-14 >2,[≤N] HARQ, CSI, DFT-s-OFDM (Pre [SR] DFT OCC)

<UL Signal/Channel Multiplexing>

For multiplexing a PUCCH and a PUSCH, the following technique may besupported. 1) time division multiplexing (TDM) between the short PUCCH(e.g., format 0/2) and the PUSCH, 2) frequency division multiplexing(FDM) between the short PUCCH for a slot having a single short UL-partof a UE (not Rel-15) (e.g., format 0/2) and the PUSCH.

For multiplexing a PUCCH and a PUSCH, the following technique may besupported.

1) TDM/FDM between the short PUCCH (e.g., format 0/2) and the long PUCCH(e.g., format 1/3/4) of different UEs.

2) TDM between the short PUCCHs (e.g., format 0/2) of the same slot of asingle UE.

3) TDM between the short PUCCH (e.g., format 0/2) and the long PUCCH(e.g., format 1/3/4) of the same slot of a single UE.

FIG. 7 illustrates an example of UL control channel multiplexing in NR.

FIG. 7 shows an example, in a single slot, that the long PUCCHs arelocated from symbol #3 to #7 and from #8 to #11 on different frequencybands in a UL region. Further, FIG. 7 shows an example that the shortPUCCHs are located on symbol #12 and #13, respectively. That is, it isshown the example that TDM is performed between the short PUCCHs andTDM/FDM is performed between the short PUCCH and the long PUCCH.

<Modulation and Coding Scheme (MCS) Offset>

In NR, both of semi-static and dynamic indications may be supported forbeta-offset. For the semi-static and dynamic indications, sets of aplurality of beta-offset values may be configured by RRC signaling, anda UL grant may indicate an index for a single set dynamically among thesets. Each of the sets may include a plurality of entries, and each ofthe entries may correspond to each of UCI types (included, in the casethat two-part CSI is applicable.).

<UCI Mapping>

For slot-based scheduling, 1) for HARQ-ACK more than 2 bits, a PUSCH maybe rate-matched. 2) For HARQ-ACK of 2 bits or less, a PUSCH may bepunctured.

In NR, the case may not be supported that a DL assignment behind a ULgrant mapped to the same time instance for HARQ-ACK transmission on aPUSCH.

In addition, the UCI piggybacked on a PUSCH (e.g., HARQ-ACK or CSI) maybe mapped to REs which are disposed in distributed manner throughout RBsassigned to a PUSCH.

Without regard to HARQ-ACK puncturing or PUSCH rate-matching, the sameRE mapping rule may be applied to the HARQ-ACK piggyback on a PUSCH. Forexample, REs may be mapped in localized manner adjacent to DM-RS ormapped in distributed manner on a time domain.

<Scheduling/HARQ Timing>

Dynamic Indication for Scheduling/HARQ Timing.

A slot timing between A and B may be indicated by a field in DCI from aset of a series of values, and the set of a series of values may beconfigured by a UE-specific RRC signaling.

All Rel-15 UEs may support a minimum value of K0 like 0.

The K0 to K2 for the A and the B may be defined as represented in Table2 below.

TABLE 2 A B K0 DL scheduling DCI Transmit corresponding DL data K1Receive DL data Corresponding HARQ-ACK K2 UL scheduling DCI Transmitcorresponding UL data

UE processing time capability may be represented by a sign (N1, N2).Here, N1 may mean the number of OFDM symbols required for a UEprocessing, from a termination of NR-PDSCH reception, in an aspect ofUE, to an available earliest start of the corresponding ACK/NACKtransmission. N2 may mean the number of OFDM symbols required for a UEprocessing, from a termination of NR-PDCCH reception, in an aspect ofUE, to an available earliest start of the corresponding NR-PUSCHtransmission.

The minimum value of (K1, K2) of a UE may be decided by (N1, N2), timingadvance value (TA value), UE DL/UL switching, and the like.

Meanwhile, in NR, two types of UE processing time capability may bedefined for slot-based scheduling of non-CA case that uses at least asingle numerology for PDCCH, PDSCH and PUSCH.

For example, for a given configuration and numerology, a UE may indicateonly one capability for N1 (or N2) based on the corresponding N1 (or N2)entry from two Tables (Table 3 and Table 4) below.

Capability #1 (Table 3): UE processing time capability

TABLE 3 HARQ 15 30 60 120 timing kHz kHz kHz kHz Configuration parameterUnit SCS SCS SCS SCS Front-loaded N1 Symbols [8] [10] [14] [14-21] DMRSonly Front-loaded + N1 Symbols [13]  [13] [17] [21] additional DMRSFrequency-first N2 Symbols [9] [11] [17] [31] RE-mapping

Capability #2 (Table 4): Active UE processing time capability

TABLE 4 HARQ timing 15 kHz 30 kHz Configuration parameter Unit SCS SCSFront-loaded DMRS only N1 Symbols [2.5-4] [2.5-6] Front-loaded +additional N1 Symbols [12] [12] DMRS Frequency-first RE-mapping N2Symbols [2.5-6] [2.5-6]

<Hybrid Numerology and Scheduling/HARQ Timing>

When numerologies between transmissions scheduled by a PDCCH and a PDCCHare different, for K0 or K2, time granularity indicated in DCI may bebased on the numerology of the scheduled transmission.

It may be supported HARQ-ACK transmission in relation to a plurality ofDL component carriers operating in the same or different numerology. Thetime granularity for k1 indicated in DCI that schedules a PDSCH may bebased on the numerology of a PUCCH transmission.

<Code Block Group (CBG) Based (Re)Transmission>

Synchronization: partial transport block (TB) retransmission may inducean efficient resource application. A unit of retransmission may be codeblock (CB) group (CBG). However, when this method is used, HARQ-ACKfeedback bit and DCI overhead may be increased.

CBG configuration: A UE may be configured semi-statically such that aretransmission based on CBG is available by RRC signaling, and theconfiguration may be distinguished for DL and UL. Maximum value N of CBGper TB may be set by RRC signaling. In the case of a single codeword(CW), the configurable maximum value of CGB per TB may be 8. In the caseof multiple CWs, the configurable maximum value of CGB per TB may be 4and the configured maximum value of CGB per TB may be same for each TB.

In the case at least a single CW, the number M of CBGs in a TB may beequal to min (C, N), herein, C may be the number of CBs in the TB. Thefirst Mod (C, M) among total M CBGs may include ceil (C/M) CB per CBG.The remaining M-Mod (C, M) CBG may include floor (C/M) CB per CBG.

In relation to DCI, CBG transmission information (CBGTI) and CBGflushing out information (CBGFI) may be introduced. CBGTI: CBG may be(re)transmitted and may be N bits of the CBGTI set by RRC. CBGFI: CBGmay be differently processed for soft-buffer/HARQ combining, anddifferent 1 bit for the CBGFI (in the case of at least a single CW).

With respect to DL data, the CBGTI and the CBGFI may be included in thesame DCI. In mode 1, the DCI may include the CBGTI. In mode 2, the DCImay include the CBGTI and the CBGFI.

With respect to UL data, the CBGTI may be configured to be included inDCI. In mode 1, the DCI may include the CBGTI.

In HARQ-ACK feedback, for an initial transmission and a retransmission,there may be a set of the same CB(s) in each CBG of a TB. When aretransmission based on CBG is set, a UE may use TB level HARQ-ACKfeedback in the case that at least HARQ-ACK multiplexing is not existed,with respect to a PDSCH scheduled by a PDCCH that uses fallback DCI.This may mean that the fallback DCI does not support CBG level HARQ-ACKfeedback.

For the semi-static HARQ-ACK codebook, the HARQ-ACK codebook may includeHARQ-ACK corresponding to all configured CBGs (including CBG which isnot scheduled). In the case that the same CBG is successfully decoded,ACK may be reported for CBG. In the case that TB CRC check is not passedwhile CB CRC check is passed for all CBs, NACK may be reported for allCBGs. In the case that the number of CBs for a TB is smaller than theconfigured maximum number of the CBG, NACK may be mapped to empty CBGindex.

Now, the present invention will be described.

When overlap occurs between SHORT DURATION UPLINK CONTROL CHANNEL(SHD_PUCCH)” and “LONG DURATION UPLINK CONTROL CHANNEL (LGD_PUCCH)”under a new radio access system (this may be referred to as new RAT orNR in the meaning of new radio), the following proposed methods may berelated to a method for processing it efficiently.

FIG. 8 illustrates LGD_PUCCH and SHD_PUCCH.

Referring to FIG. 8(a), “LGD_PUCCH (or LONG PUCCH)” means a PUCCHtransmitted with being “frequency division multiplexing (FDM)” with aphysical uplink shared channel (PUSCH) while occupying total symbols orthe remaining symbols except a predetermined number of symbols of aspecific position (e.g., the last position) in the time domain in aspecific time unit (e.g., SUBFRME or SLOT). Herein, the PUSCH means anuplink data channel.

Referring to FIG. 8(b), “SHD_PUCCH (or SHORT PUCCH)” means a PUCCHtransmitted with being “time division multiplexing (TDM)” with a PUSCHwhile occupying a predetermined number of symbols of a specific position(e.g., the last symbol) in the time domain in a specific time unit(e.g., SUBFRME or SLOT).

The LGD_PUCCH may be used for transmitting relatively large amount ofinformation, and the SHD_PUCCH may be used for transmitting relativelysmall amount of information. The LGD_PUCCH and the SHD_PUCCH may beselected properly considering whether it is located on a feedbackrequested time/cell boundary.

FIG. 9 illustrates the case that the LGD_PUCCH and the SHD_PUCCH areoverlapped.

Referring to FIG. 9, a UE may receive DL grant #1 on slot #n and receiveDL grant #2 on slot #m. For example, the UE may have to receive datascheduled by DL grant #1 on slot #n and transmit ACK/NACK for the dataon slot #k. In this case, the UE may be configured to transmit ACK/NACKusing the LGH_PUCCH. In addition, the UE may have to receive datascheduled by DL grant #2 on slot #m and transmit ACK/NACK for the dataon slot #k. In this case, since the ACK/NACK transmission timing isshort, the UE may be configured to transmit ACK/NACK using the SHD_PUCCHinstead of the LGH_PUCCH.

In this case, transmissions of the LGH_PUCCH and the SHD_PUCCH arescheduled on the same slot, and this may be represented as the LGH_PUCCHand the SHD_PUCCH are overlapped.

In the present invention, the term “overlap” may be interpreted as (A)the case that actual “(frequency) resource” is (wholly or partially)overlapped between the SHD_PUCCH and the LGH_PUCCH and/or (B) the casethat transmissions of “(frequency) resource” is not overlapped, but twochannels (/signals) are configured on the same symbol.

The term “SHD_PUCCH” may be (extendedly) interpreted (/(mutually)substituted) to/by “SRS (or “PUSCH”)”. And/or the term “LGH_PUCCH” maybe (extendedly) interpreted (/(mutually) substituted) to/by “PUSCH (or“SRS”)”.

In such a case, the same or different proposed method described in thepresent invention may be applied to each of the four combinations (e.g.,“SHD_PUCCH and LGD_PUCCH”, “SHD_PUCCH and PUSCH (or SRS)”, “LGD_PUCCHand SRS (or PUSCH)” and “PUSCH and SRS”). In the present invention, theterm “puncturing (or “rate matching”) may be (mutually) substituted by“rate matching (or “puncturing”)”. In the present invention, the term“SLOT (or “SUBFRAME”)” may be (mutually) substituted by “SUBFRAME (or“SLOT”)”.

Now, in the case that the LGH_PUCCH and the SHD_PUCCH are overlapped,the scheme of processing it will be described in detail.

FIG. 10 illustrates a method for transmitting UL control channelaccording to an embodiment of the present invention.

Referring to FIG. 10, a UE may determine whether a first physical uplinkcontrol channel (PUCCH) and a second PUCCH are overlapped (step, S10)and decide a transmission technique of the first PUCCH and the secondPUCCH based on the determination (step, S11). The first PUCCH may be theLGD_PUCCH described above and the second PUCCH may be the SHD_PUCCHdescribed above. That is, the first PUCCH may be a UL control channelwhich is frequency division multiplexing (FDM) with a data channel andthe second PUCCH may be a UL control channel which is time divisionmultiplexing (TDM) with the data channel.

[Proposed method #1-1] As an example, “time gap (this is referred to asDRUT_TINTERVAL)” between “a reception time of DL GRANT” and “atransmission time of (interlinked) SHD_PUCCH” is greater than or equalto “(minimum UL control information processing time” of the SHD_PUCCH(and/or a minimum processing time required for piggybacking theLGD_PUCCH (or PUSCH) of the SHD_PUCCH) (this is referred to asMIN_REQTB), it may be configured to piggyback the SHD_PUCCH to theLGD_PUCCH (or PUSCH). Otherwise (e.g., in the case that theDRUT_TINTERVAL is smaller than the MIN_REQTB), it may be configured topiggyback the LGD_PUCCH to the SHD_PUCCH.

FIG. 11 illustrates a method for transmitting UL control channelaccording to proposed method #1-1.

Referring to FIG. 11, a UE may determine a time gap between a receptiontiming of a DL grant and a transmission timing of the SHD_PUCCH (step,S100), and based on the time gap, determine whether to piggyback theSHD_PUCCH to the LGD_PUCCH (step, S110).

At this time, (A) the amount of information of the LGD_PUCCH piggybackedto the SHD_PUCCH and/or (B) whether the LGD_PUCCH is piggybacked to theSHD_PUCCH (finally), may be different according to the (maximum) payloadsize of the SHD_PUCCH.

As an example, in the case that the (maximum) payload size of theSHD_PUCCH is smaller than a threshold value which ispreconfigured/signaled in advance, the LGD_PUCCH may not be piggybackedto the SHD_PUCCH. In such as case, the LGD_PUCCH may be punctured in the“resource element (and/or resource block and/or sequence and/or symbol)”level (considering SHD_PUCCH (region)) and/or a (transmission) of theLGD_PUCCH (or the SHD_PUCCH) may be “dropped (or “stopped”)”.

As another example, in the case that the PUSCH (or the LGD_PUCCH) andthe SHD_PUCCH are “TDM” (transmitted/scheduled) (on the same slot) andan operation is configured to transmit UCI to which a transmission tothe SHD_PUCCH is configured (transmitted/scheduled) according to apredefined rule by piggybacking with the PUSCH (or the LGD_PUCCH), a UEmay operate to perform a transmission to the SHD_PUCCH according to whatis configured (/indicated) originally, in addition to transmit thecorresponding UCI to which a transmission to the SHD_PUCCH is configured(/indicated) by piggybacking with the PUSCH (or LGD_PUCCH).

That is, in the situation, the UCI to which a transmission to theSHD_PUCCH is configured (/indicated) may be transmitted through both thePUSCH (or the LGD_PUCCH) and the SHD_PUCCH which is “TDM” in the sameslot. In the case that such a rule is applied, the UCI to which atransmission to the SHD_PUCCH is configured (/indicated) is repeatedlytransmitted, and the performance may be improved.

[Proposed method #1-2] The LGD_PUCCH (or PUSCH) may be punctured in“RESOURCE ELEMENT (RE) (and/or (physical) RESOURCE BLOCK (RB) and/orsequence (e.g., ZADOFF-CHU sequence) and/or symbol)” (considering theSHD_PUCCH (or SRS) (region)).

Particularly, for the (partially) remaining (the LGD_PUCCH (or PUSCH))region after applying RESOURCE ELEMENT (and/or RESOURCE BLOCK and/orsequence level puncturing, the “partial DFT (e.g., L-POINT DFT spreading(e.g., “M>L”))” considering the remaining region may be applied.

Here, as an example, (when the SHD_PUCCH (or SRS) (e.g., ZADOFF-CHUsequence) (region) puncturing is performed on a frequency domain(R_FRQDOMAIN) after applying M-POINT DFT spreading) a resource positionapplying L-POINT DFT spreading which is (partially) remaining (orinterlinked (/mapped) with/to the LGD_PUCCH (or PUSCH)) region) afterapplying (the SHD_PUCCH (or SRS) on R_FRQDOMAIN (region) puncturing maybe identically configured (/signaled) with (A) (the LGD_PUCCH (or PUSCH)region (resource block (/resource element)) index (partially) remainingon R_FRQDOMAIN.

And/or (B) the resource position may be L (resource block (/resourceelement)) indices in a descending order (or ascending order) directionfrom MAX (or MIN) V_FRQDOMAIN (resource block (/resource element)), forexample) position which is preconfigured (/signaled in advance) onV_FRQDOMAIN.

As an example, the number of (total) (resource block) resources to whichL-POINT DFT spreading is applied may be defined as a value which can berepresented as “2X*3Y*5Z (herein, for example, X/Y/Z are non-zeropositive integers)”.

That is, in the case that resources of the LGD_PUCCH (or PUSCH) and theSHD_PUCCH (or SRS) are overlapped in the frequency domain, a method maybe considered that DFT process (of reduced size) for the LGD_PUCCH (orPUSCH) information is performed with the size corresponding to theremaining resource except as much as the frequency which is overlappedin the symbol in which resource overlap occurs, an output signal of thecorresponding DFT is mapped/transmitted (e.g., puncturing or ratematching) only to the LGD_PUCCH (or PUSCH) resource which is notoverlapped with the SHD_PUCCH (or SRS) on the REAL FREQUENCY.

FIG. 12 illustrates an example of performing DFT of UL control channel.

Referring to FIG. 12, in the case that the SHD_PUCCH and the LGD_PUCCHare overlapped, a UE performs a DFT process of a size that correspondsto a frequency resource (number of subcarriers) which is not overlappedin the symbol in which overlap occurs (step, S200). Thereafter, the UEmay map the output signal of DFT only to the frequency resource of theLGD_PUCCH in which overlap does not occur (step, S210).

For example, in the case that the resource allocated to the LGD_PUCCH(or PUSCH) is M resource blocks and in the case that the resourceoverlapped with the SHD_PUCCH (or SRS) is K resource blocks (i.e., theresource which is not overlapped with the SHD_PUCCH (or SRS) is“L=(M−K)” resource blocks), DFT process of M resource block size may beperformed for the LGD_PUCCH (or PUSCH) with respect to the symbol inwhich there is no overlap of frequency domain. On the other hand, withrespect to the symbol in which there is overlap of frequency domain, DFTprocess of L resource block size may be performed for the LGD_PUCCH (orPUSCH).

As an example, the output signal of DFT of the corresponding L resourceblock size may be mapped/transmitted to L resource blocks in which thereis no overlapped with the SHD_PUCCH (or SRS) among the resourcesassigned to the LGD_PUCCH (or PUSCH) on the REAL FREQUENCY

At this time, in the case of L resource blocks which is an input of DFTon the VIRTUAL FREQUENCY, in the state that (A) it is determined to anindex corresponding to the lowest or the highest L resource blocks onthe VIRTUAL FREQUENCY index and/or (B) the VIRTUAL FREQUENCY and theREAL FREQUENCY are one-to-one corresponded in a descending order or anascending order, the LGD_PUCCH (or PUSCH) signal may be determined to bethe VIRTUAL FREQUENCY index of L resource blocks corresponding to theVIRTUAL FREQUENCY of the L resource blocks in which there is no overlapto be mapped/transmitted.

As another example, the SHD_PUCCH (or SRS) may be punctured in “resourceelement (and/or resource block and/or sequence and/or symbol)” level(considering the LGD_PUCCH (or PUSCH) (region)).

As an example, whether to (finally) apply the corresponding (SHD_PUCCH)puncturing may be changed according to “whether it is the SHD_PUCCH type(e.g., whether it is LOCALIZED SHD_PUCCH or DISTRIBUTED SHD_PUCCH,herein, the DISTRIBUTED SHD_PUCCH may be a format in which BASICSEQUENCE UNIT is repeatedly transmitted (on the frequency axis))”.

As a specific example, in the case of the LOCALIZED SHD_PUCCH, theLGD_PUCCH (or PUSCH) may be punctured (considering the SHD_PUCCH(region)) and on the other hand, in the case of the DISTRIBUTEDSHD_PUCCH, the SHD_PUCCH may be punctured (considering the LGD_PUCCH (orPUSCH) (region)).

As another example, for multiplexing between the SHD_PUCCH (or SRS) andthe LGD_PUCCH (or PUSCH) of different UEs, the rate matching (orpuncturing) of “(UL control) sub band and/or symbol” level may beindicated “semi-statically” or “dynamically” (through a predefinedsignaling).

As another example, in the case that the PUSCH and the SHD_PUCCH are“overlapped” on the same slot, a rule applied to the PUSCH may bechanged according to SHD_PUCCH symbol position (on the slot) (and/or thenumber of remaining PUSCH symbols after the last symbol position of theSHD_PUCCH (this is referred to as REMSYM_NUM).

FIG. 13 illustrates a first example of puncturing the PUSCH according toa symbol position of the SHD_PUCCH in the case that he PUSCH and theSHD_PUCCH are “overlapped” on the same slot.

Referring to FIG. 13, the SHD_PUCCH is located on the last symbol on aslot (i.e., the number of remaining PUSCH symbols after the last symbolposition of the SHD_PUCCH, that is, REMSYM_NUM is “0”), and in thiscase, only the PUSCH symbol overlapped with the SHD_PUCCH may bepunctured in “resource element (and/or resource block and/or sequenceand/or symbol)” level.

FIG. 14 illustrates a second example of puncturing the PUSCH accordingto a symbol position of the SHD_PUCCH in the case that he PUSCH and theSHD_PUCCH are “overlapped” on the same slot.

Referring to FIG. 14, the SHD_PUCCH is not located on the last symbol ona slot (i.e., located in the second symbol from the end position, i.e.,the case that the number of PUSCH symbols remaining after the lastsymbol position of the SHD_PUCCH, REMSYM_NUM is not “0”), and in thiscase, (all) later PUSCH (symbol) transmission including the PUSCH symboloverlapped with the SHD_PUCCH may be omitted (and/or without regard tooverlap, (entire) PUSCH transmissions are omitted).

As shown in FIGS. 13 and 14, in the case that the second PUCCH(SHD_PUCCH) and a data channel (PUSCH) are overlapped, the symbolpunctured in the data channel may be differently determined according tothe symbol on which the second PUCCH is located.

As another example, (resource) overlap processing rule between theSHD_PUCCH (or SRS) and the PUSCH (or LGD_PUCCH) may be changed accordingto PUSCH (or LGD_PUCCH) WAVEFORM.

As an example, (A) in the case that the PUSCH (or LGD_PUCCH) is “SC-FDM”or “DFT-S-OFDM” form, (considering the symbol on which the (overlapped)SHD_PUCCH (or SRS) is transmitted), it may operate such that the PUSCH(or LGD_PUCCH) is punctured with “symbol” level.

In such as case, the corresponding PUSCH (or LGD_PUCCH) signal may notbe mapped/transmitted to the symbol on which the (overlapped) SHD_PUCCH(or SRS) is transmitted and may be mapped/transmitted only to theremaining symbol except the symbol among the assigned resources for thePUSCH (or LGD_PUCCH) transmission.

As another example, (B) in the case that the PUSCH (or LGD_PUCCH) is“OFDM” form, (considering the resource block (/resource element) onwhich the (overlapped) SHD_PUCCH (or SRS) is transmitted), it mayoperate such that the PUSCH (or LGD_PUCCH) is punctured with “resourceblock (/resource element)” level.

In such as case, the corresponding PUSCH (or LGD_PUCCH) signal may notbe mapped/transmitted to the resource block (/resource element) on whichthe SHD_PUCCH (or SRS) signal is mapped/transmitted in the symbol onwhich the SHD_PUCCH (or SRS) is transmitted and may bemapped/transmitted only to the remaining symbol except the resourceblock (/resource element) (among the assigned resources for the PUSCH(or LGD_PUCCH) transmission).

[Proposed method #1-3] In the case that different channels areoverlapped, a method of dropping/stopping any one channel is described.

FIG. 15 illustrates a method according to proposed method #1-3.

Referring to FIG. 15, it is determined whether the SHD_PUCCH or theLGD_PUCCH is overlapped with other channel (step, S20), and a specificchannel is dropped (or stopped) according to a priority (step, S21).Hereinafter, proposed method #1-3 will be described in more detail.

In the case that the LGD_PUCCH (or PUSCH) and the SHD_PUCCH (or SRS) areoverlapped, the LGD_PUCCH (or PUSCH) (or the SHD_PUCCH (or SRS)) may be“(transmission) dropped” (or “(transmission) stopped”).

Here, “(transmission) stopped” may be interpreted as omitting only thetransmission on a region on which “overlap” occurs and/or omitting (all)transmissions after transmission of the region on which “overlap”occurs.

As an example, “(transmission) stopped” of the LGD_PUCCH may be(limitedly) applied in the case that SHD_PUCCH (transmission) indicationis detected after LGD_PUCCH (transmission) start. Here, depending on thetime of detection, (A) it may be differently configured to apply between“(transmission) dropped” (not transmitting entire channels) and“(transmission) stopped” (stopped only on the overlapped region andtransmitted on other regions). For example, the “(transmission) dropped”of the LGD_PUCCH may be applied in the case that the SHD_PUCCH(transmission) indication is detected before LGD_PUCCH (transmission)start and/or the “(transmission) stopped” of the SHD_PUCCH may beapplied in the case that the SHD_PUCCH (transmission) indication isdetected after LGD_PUCCH (transmission) start.

And/or (B) it may be differently configured to apply between“(transmission) stopped” and “puncturing”. For example, the “puncturing(considering SHD_PUCCH (region))” of the LGD_PUCCH may be applied in thecase that the SHD_PUCCH (transmission) indication is detected afterLGD_PUCCH (transmission) start and/or the “puncturing (consideringLGD_PUCCH (region))” of the SHD_PUCCH may be applied in the case thatthe SHD_PUCCH (transmission) indication is detected after LGD_PUCCH(transmission) start. And/or “(transmission) stopped” of the LGD_PUCCHmay be applied in the case that the SHD_PUCCH (transmission) indicationis detected before (/after) LGD_PUCCH (transmission) start.

As an example, in the case that “overlap” occurs between the SHD_PUCCHand the SRS (and/or the LGD_PUCCH and the PUSCH), the SRS (or theSHD_PUCCH) (and/or the PUSCH (or the LGD_PUCCH) may be “(transmission)dropped” (or “(transmission) stopped”).

[Proposed method #1-4] Depending on channels (/signals) between which“overlap” occurs (e.g., between LGD_PUCCH, SHD_PUCCH, PUSCH and SRS),even it is the same channel (/signal), the applied rule (e.g.,piggyback, puncturing, (transmission) dropped, (transmission) stopped,etc.) may be changed.

As an example, (A) in the case that “overlap” occurs between theSHD_PUCCH and the LGD_PUCCH, the LGD_PUCCH is punctured (consideringSHD_PUCCH (region)), and (B) in the case that “overlap” occurs betweenthe LGD_PUCCH and the SRS, the SRS may be (transmission) dropped (or theSRS is punctured (considering LGD_PUCCH (region)).

As an example, (in the case that “overlap” occurs between differentchannels (/signals)), the priority of applying puncturing (and/or(transmission) dropped and/or (transmission) stopped) may be defined as“SHD_PUCCH<SRS<LGD_PUCCH<PUSCH”. Herein, the right position representsrelatively high priority than the left position, and the channel(/signal) of relatively high priority may be punctured considering thechannel (/signal) of relatively low priority.

As an example, it may be configured such that aperiodic channel(/signal) transmission has relatively low (or high) puncturing (and/or(transmission) dropped and/or (transmission) stopped) applicationpriority than periodic channel/signal (e.g., “aperiodic CSI<aperiodicSRS<periodic CSI<periodic SRS”).

The following proposed methods proposes a configuration method of“(power) TRANSIENT PERIOD)” per channel (/signal) under the NR system.

[Proposed method #2-1] As an example, the priority related to “(power)TRANSIENT PERIOD)” configuration may be defined (/signaled) as“SHD_PUCCH>SRS>LGD_PUCCH>PUSCH”. Here, the right position representsrelatively low priority than the left position, the “(power) TRANSIENTPERIOD)” related to the channel (/signal) of relatively low priority maybe configured within the corresponding channel (/signal) (transmission)region (e.g., the first/the last symbol), and the “(power) TRANSIENTPERIOD)” related to the channel (/signal) of relatively high prioritymay be configured outside of the corresponding channel (/signal)(transmission) region.

As an example, “(power) TRANSIENT PERIOD)” may be differently configureddepending on the number of (configuration) symbols and/or positionsrelated to the channel (/signal).

The following proposed methods proposes a method ofcontrolling/distributing transmission power efficiently when LGD_PUCCH(or PUSCH) transmission and SHD_PUCCH (or SRS) transmission is“overlapped” (e.g., “(frequency) resources” are not overlapped, but twochannel transmission is (partially or wholly) overlapped (on the timedomain)) under the NR system.

(A part of) the following methods may be limitedly applied only to“POWER LIMITED CASE”. (A part of) the following methods may beextendedly applied even to the case that after the LGD_PUCCH (or PUSCH)transmission is (already) started, the SHD_PUCCH transmission throughthe same symbol(s) is indicated.

[Proposed method #3-1] Transmission power control/distribution may beperformed in a unit of “PARTIAL SLOT” (e.g., “HALF SLOT”) preconfigured(/signaled in advance).

Here, the “PARTIAL SLOT” may be designated (A) in a unit of UCI symbolset depending on a single DM-RS (channel estimation/decoding) and/or (B)in a unit of UCI symbol set to which CDM (or orthogonal cover code(OCC)) is applied. For example, in a unit of the (at least) “PARTIALSLOT”, a power transmission may be regularly maintained.

[Proposed method #3-2] In the case of not “POWER LIMITED CASE”, asimultaneous transmission of (“overlapped”) two channels is allowed, andon the other hand, in the case of “POWER LIMITED CASE”, (A) theSHD_PUCCH (UCI) information may be piggybacked to the PUSCH (orLGD_PUCCH) and/or (B) the PUSCH (or LGD_PUCCH) may be punctured(considering SHD_PUCCH (region)) and/or (C) the PUSCH (or LGD_PUCCH) (orthe SHD_PUCCH) may be (transmission) dropped (or (transmission)stopped).

In the case that the rule is applied, the PUSCH (or LGD_PUCCH) may notbe changed therebetween but may be maintained uniformly. In order toprevent confusion in a reception base station, without regard to “POWERLIMITED CASE” of a UE, the same rule (e.g., simultaneous transmission,piggyback, puncturing, (transmission) dropped, (transmission) stopped,etc.) may be applied (e.g., [Proposed method #1-1] to [Proposed method#1-4]).

As another example, in the case of not “POWER LIMITED CASE”, asimultaneous transmission of (“overlapped”) two channels is allowed, andon the other hand, in the case of “POWER LIMITED CASE”, when the PUSCH(or LGD_PUCCH) is transmitted with “MODULATION ORDER” (e.g., “QPSK”)which is smaller than or equal to a threshold value preconfigured(/signaled in advance), it may be transmitted with the form that onlythe transmission power of PUSCH (or LGD_PUCCH) which is overlapped withthe SHD_PUCCH (region) is reduced (e.g., with the form that (maximum)transmission power of a UE is distributed between the PUSCH (orLGD_PUCCH) and the SHD_PUCCH according to a predefined rule), and on theother hand, in the case that the PUSCH (or LGD_PUCCH) is transmittedwith “MODULATION ORDER” (e.g., “16 QAM”) which is greater than athreshold value preconfigured (/signaled in advance), the transmissionpower of PUSCH (or LGD_PUCCH) which is overlapped with the SHD_PUCCHregion is reduced, and simultaneously, additional DM-RS may betransmitted to the corresponding region part.

FIG. 16 illustrates a power control method for UL control channel.

Referring to FIG. 16, a UE determines whether it is POWER LIMITED CASE(step, S30), and in the case of not POWER LIMITED CASE, the UE transmitsboth of two channels (first and second channels) which are overlapped(step, S31). In the case of POWER LIMITED CASE, when the MODULATIONORDER of the first channel is a threshold value or less, thetransmission power of the first channel part which is overlapped isreduced, otherwise, the transmission power of the first channel partwhich is overlapped is reduced and the DM-RS is transmitted additionally(step, S32).

The additional DM-RS mapping may be performed by puncturing data of thePUSCH (or LGD_PUCCH). The additional DM-RS may be mapped on the firstsymbol of the PUSCH (or LGD_PUCCH) (region) part overlapped (with theSHD_PUCCH (region)) (and/or W^(th) symbol which is predefined (/signaledin advance)).

The change of whether to transmit the additional DM-RS depending on“POWER LIMITED CASE” may be not preferable in an aspect of a receptionbase station which is difficulty in determining whether a UE is in“POWER LIMITED CASE” accurately. Accordingly, without regard to “POWERLIMITED CASE” of the UE, when the PUSCH (or LGD_PUCCH) is transmittedwith “MODULATION ORDER” (e.g., “16 QAM”) which is greater than athreshold which is preconfigured (/signaled in advance), the additionalDM-RS may be transmitted always to the part which is overlapped with theSHD_PUCCH (region).

In the case that the rule is applied, the PUSCH (or LGD_PUCCH)transmission power may be changed in the middle.

The additional DM-RS mapping described above may be not applied(/performed) in the case that a DM-RS transmission is (already)configured on the PUSCH (or LGD_PUCCH) (region) part which is overlappedwith the SHD_PUCCH (region) (e.g., if there is the PUSCH of which DM-RSdensity (on time axis) is increased owing to the reason such as(particularly) PUCCH of multiple symbol DM-RS structure, HIGH MOBILITYenvironment, etc.).

As another example, in the case of assuming that there is no case ofindicating SHD_PUCCH transmission through the same symbol(s) on thetiming after the LGD_PUCCH (or PUSCH) transmission is (already) started,without the (corresponding) additional DM-RS transmission, even in“POWER LIMITED CASE”, it is transmitted in the transmission power inwhich PUSCH (or LGD_PUCCH) is reduced without change in the middle(together with the SHD_PUCCH) and/or the (corresponding) PUSCH (orLGD_PUCCH) transmission may be omitted (or stopped).

As another example, the additional DM-RS mapping rule (described above)may be (limitedly) applied only to the PUSCH overlapped with theSHD_PUCCH (region).

FIG. 17 illustrates a multiple slot LGD_PUCCH which may be introduced inNR.

Referring to FIG. 17, the LGD_PUCCH may be transmitted through slot #1to slot #3, that is, multiple slots. This may be referred to as multipleslot LGD_PUCCH.

The following proposed methods proposes an efficient transmission powercontrol method and/or information (or modulation coded symbol) mappingmethod and/or reference signal (RS) structure in the case that the“multiple slot LGD_PUCCH (or PUSCH) transmission” is performed, underthe NR system.

[Proposed method #4-1] As an example, (A) the transmission power value(calculated) in the first slot may be applied in the same way to theremaining slots (OPTION #A) and/or (B) according to (predefined) TPCcommand reception/application time line, the transmission power valuemay be independently calculated/applied in each slot (OPTION #B) and/or(C) in the case of the slot in which a reference signal (RS, e.g.,DM-RS) is transmitted (this is referred to as RS-slot), the transmissionpower value may be independently calculated/applied, and on the otherhand, in the case of the slot in which a reference signal is nottransmitted (this is referred to as NONRS-slot), the transmission powervalue (calculated) in the nearest RS-slot before (/after) is identicallyapplied (OPTION #C).

Here, as an example, depending on “multiple slot LGD_PUCCH (or PUSCH)”(and/or “MODULATION ORDER” of “UCI (or data”), the applied rule may bedifferently defined. As a specific example, in the case of “QPSK”,(OPTION #B) may be applied. On the other hand, in the case of “(16)QAM”, (OPTION #A) (or (OPTION #C)) may be applied.

[Proposed method #4-2] The information (related to specific UCI(/transport block) to transmit (or modulation coded symbol) (A) may bemapped to the LGD_PUCCH (or PUSCH) on the first slot (preferentially),and then, mapped to the remaining slots (in the same way) repeatedlyand/or (B) assuming that a plurality of slots is a single (virtual)“SUPER-SLOT” and mapped (in the SLOT-WISE form).

As another example, a plurality of transport blocks may be transmitted(together) through “multiple slot PUSCH” (e.g., PUSCH transmission basedon “K” number of slots). At this time, the number (L) (e.g., “L<K”) ofconsecutive slots which are used in a single transport blocktransmission may be preconfigured (/signaled in advance).

[Proposed method #4-3] In the case that the “multiple slot LGD_PUCCH (orPUSCH) transmission” is performed, (A) the reference signal structure(e.g., reference signal (symbol) position and/or (frequency/time)density, etc.) used in the “single slot LGD_PUCCH (or PUSCH)” may berepeatedly applied for each slot without any change and/or (B) thereference signal structure applied to the “multiple slot LGD_PUCCH (orPUSCH) transmission” may be additionally (or independently) configured(/signaled).

The following proposed methods proposes, in the case that the “multipleslot LGD_PUCCH (or PUSCH)” (partial) transmission and other channel(/signal) transmission (e.g., SHD_PUCCH (or SRS or PUSCH)) are“overlapped”, a method for processing this efficiently is proposed.

[Proposed method #5-1] As an example, in the case that the“(transmission) dropped” rule should be applied to the “multiple slotLGD_PUCCH (or PUSCH)”, (A) only the (LGD_PUCCH (or PUSCH)) transmissionon (a part of) the slot which is actually overlapped with the SHD_PUCCH(or SRS or PUSCH) transmission is omitted and/or (B) the entire“multiple slot LGD_PUCCH (or PUSCH)” transmissions are omitted.

Alternatively, the “multiple slot LGD_PUCCH (or PUSCH)” (partial)transmission and other channel (/signal) transmission are “overlapped”,(exceptionally) the other channel (/signal) transmission may be“(transmission) dropped” (always).

As another example, in the case that the “(transmission) stopped” ruleshould be applied to the “multiple slot LGD_PUCCH (or PUSCH)”, (A) onlythe (LGD_PUCCH (or PUSCH)) transmission on (a part of) the slot which isactually overlapped with the SHD_PUCCH (or SRS or PUSCH) transmission isomitted and/or (B) (all) the (LGD_PUCCH (or PUSCH)) transmissions up tothe most closest “slot boundary” thereafter including the (LGD_PUCCH (orPUSCH)) transmission on the (part of) symbol which is actuallyoverlapped with the SHD_PUCCH (or SRS or PUSCH) transmission are omittedand/or (C) (all) the “multiple slot LGD_PUCCH (or PUSCH)” transmissionthereafter including the (LGD_PUCCH (or PUSCH)) transmission on the(part of) symbol which is actually overlapped with the SHD_PUCCH (or SRSor PUSCH) transmission are omitted.

Alternatively, in the case that the “multiple slot LGD_PUCCH (or PUSCH)”(partial) transmission and other channel (/signal) transmission are“overlapped”, exceptionally the other channel (/signal) transmission maybe “(transmission) stopped” (always).

As another example, in the case that the rule of piggybacking theSHD_PUCCH (or PUSCH) to the “multiple slot LGD_PUCCH (or PUSCH)” needsto be applied, (A) it is piggybacked to the (LGD_PUCCH (or PUSCH)) on (apart of) the slot which is actually overlapped with the SHD_PUCCH(PUSCH) transmission (and/or piggybacked to the N^(th) (LGD_PUCCH (orPUSCH)) (on slot) which is preconfigured (/signaled in advance)(always)) and/or (B) (without regard to actual overlap) it ispiggybacked to the LGD_PUCCH (or PUSCH) of all slots (repeatedly).

On the other hand, in the case that the rule of piggybacking the“multiple slot LGD_PUCCH (or PUSCH)” to the PUSCH (or SHD_PUCCH) needsto be applied, the LGD_PUCCH (or PUSCH) on the (part of) slot which isactually overlapped may be piggybacked to the PUSCH (or SHD_PUCCH).

Under the NR system, when “aperiodic CSI (/SRS)” transmission istriggered on the DCI (this is referred to as MUSL-DCI) that indicates(/schedules) the “multiple slot LGD_PUCCH (or PUSCH)”, the following(part of) rule may be applied.

[Proposed method #6-1] As an example, (A) the “aperiodic CSI (/SRS)”transmission is performed only on the N^(th) slot (e.g., “N=1”) which ispreconfigured (/signaled in advance) and/or (B) the “aperiodic CSI(/SRS)” transmission is (repeatedly) performed on all slots.

Alternatively, through the field of the corresponding use defined on theMUSL-DCI, the order of slot on which the “aperiodic CSI (/SRS)”transmission is performed may be signaled.

Under the NR system, a specific channel (/signal) (e.g., LGD_PUCCH,PUSCH (and/or SHD_PUCCH, SRS)) related hopping bandwidth and/or mappingregion may be determined according to the following (part of) rule.

As an example, in order to prevent (excessive) “(power) TRANSIENTPERIOD”, “(intra-slot) (frequency) hopping” is not applied to theSHD_PUCCH (e.g., (limitedly) applied to the LGD_PUCCH (or PUSCH))(and/or not applied to the PUCCH including symbols of the number smallerthan a threshold value which is preconfigured (/signaled in advance)).

[Proposed method #7-1] In the entire system band, (sub) band informationin which (frequency) hopping of the LGD_PUCCH (/PUSCH) (and/or theSHD_PUCCH (/SRS)) is performed and/or (sub) band information in which“distributed mapping” of the SHD_PUCCH (/SRS) (and/or the LGD_PUCCH(/PUSCH)) may be signaled.

Since the examples for the proposed methods may be included as one ofthe implementation methods of the present invention, it is apparent factthat the examples for the proposed methods may be regarded as a sort ofproposed methods. In addition, although the proposed methods describedabove may be independently implemented, proposed methods may beimplemented in a combination (or merge) of a part of the proposedmethods. The scope of system to which the proposed methods are appliedmay be extended to other systems in addition to 3GPP LTE/LTE-A system.For example, the proposed methods may be limited applied only to thecase that the LGD_PUCCH (or PUSCH (or SRS)) and the SHD_PUCCH (or SRS(or PUSCH)) are transmitted (with being “overlapped”) on the same slot(and/or time domain).

Alternatively, the proposed methods of the present invention may belimited applied only to the SHD_PUCCH (and/or distributed SHD_PUCCH)locally. For example, the proposed methods of the present invention maybe limited applied only to “overlap” handling between the LGD_PUCCH (orPUSCH (or SRS)) and the SHD_PUCCH (or SRS (or PUSCH)) of a “SINGLE UE”(and/or “different UEs with each other”).

Alternatively, the proposed methods of the present invention may belimited applied only to the SHD_PUCCH (and/or LGD_PUCCH) and/or PUSCH(and/or SRS) transmission in “SC-FDM” (or “DFT-S-OFDM”) (or “OFDM”)form.

FIG. 18 is a block diagram illustrating a communication apparatus inwhich the embodiment of the present invention is implemented.

Referring to FIG. 18, a base station 100 includes a processor 110, amemory 120 and a radio frequency (RF) unit 130. The processor 110implements the proposed function, process and/or method. The memory 120is connected to the processor 110 and stores various types ofinformation for driving the processor 110. The RF unit 130 is connectedto the processor 110 and transmits and/or receives a wireless signal.The RF unit 130 may also be referred to as a transceiver.

A UE 200 includes a processor 210, a memory 220 and a RF unit 230. Theprocessor 210 implements the proposed function, process and/or method.For example, the processor 210 may perform a UL communication byreceiving parameter related to the UL communication and applying theparameter, which is independently configured for each analog beam. Inthis case, in the case of performing the UL communication by using aspecific analogue beam, the parameter related to the UL communicationset to the specific analogue beam may be applied to the ULcommunication. The memory 220 is connected to the processor 210 andstores various types of information for driving the processor 210. TheRF unit 230 is connected to the processor 210 and transmits and/orreceives a wireless signal. The RF unit 230 may also be referred to as atransceiver.

The processor 110 or 210 may include a converter that converts differentchip set, logical signal, data processing device and/or baseband signaland wireless signal with each other.

The memory 120 or 220 may include read-only memory (ROM), random accessmemory (RAM), flash memory, memory card, storage medium and/or otherstorage device. The RF unit 130 or 230 may include one or more antennasfor transmitting and/or receiving a wireless signal. When the embodimentis implemented by software, the technique described above may beimplemented by a module (process, function, etc.) for performing thefunction described above. The module may be stored in the memory 120 or220 and executed by the processor 110 or 210. The memory 120 or 220 maybe located interior or exterior to the processor 110 or 210 and may beconnected to the processor 110 or 210 with various well-known means.

What is claimed is:
 1. A method for transmitting uplink controlinformation (UCI) and a sounding reference signal (SRS) by a userequipment (UE) in a wireless communication system, the methodcomprising: generating the UCI; transmitting more than one physicaluplink shared channels (PUSCHs), wherein based on physical uplinkcontrol channel (PUCCH) resources of a first PUCCH not overlapping intime with the more than one PUSCHs, the UCI is transmitted through thefirst PUCCH, and wherein based on the PUCCH resources of the first PUCCHoverlapping in time with the more than one PUSCHs, the UCI istransmitted through only a predefined N^(th) PUSCH among the more thanone PUSCHs; determining that at least one SRS symbol, among a pluralityof symbols to be used for transmitting the SRS, overlaps in time with atleast one PUCCH symbol to be used for transmitting a second PUCCH; andbased on the at least one SRS symbol overlapping in time with the atleast one PUCCH symbol: based on the SRS being a periodic SRS, and basedon the second PUCCH being configured to carry channel state information(CSI): (i) dropping, among the plurality of symbols to be used fortransmitting the SRS, only the at least one SRS symbol that overlapswith the at least one PUCCH symbol, and (ii) transmitting the SRSthrough at least one symbol, among the plurality of symbols, excludingthe at least one SRS symbol; and based on the SRS being an aperiodicSRS, and based on the second PUCCH being configured to carry periodicCSI: not transmitting the second PUCCH.
 2. The method of claim 1,wherein the UCI comprises at least one of (i) Hybrid Automatic Repeatand request (HARQ) acknowledgement/negative-acknowledgement (ACK/NACK)or (ii) channel state information (CSI).
 3. The method of claim 1,wherein the UE supports a transmission of a PUCCH over one slot ormultiple slots.
 4. The method of claim 1, wherein the UE supports atransmission of a PUSCH over one slot or multiple slots.
 5. The methodof claim 1, wherein the UE transmits a PUCCH carrying UCI using at leastone symbol.
 6. The method of claim 1, wherein priorities for setting atransient period is defined in order of (i) a short PUCCH comprising 1or 2 symbols, (ii) a sounding reference signal (SRS), (iii) a long PUCCHcomprising 4-14 symbols, and (iv) PUSCH.
 7. The method of claim 1,wherein the N^(th) PUSCH is predefined at a fixed N^(th) position amongthe more than one PUSCHs that are transmitted by the UE.
 8. A userequipment (UE) configured to operate in a wireless communication system,the UE comprising: a transceiver; at least one processor; and at leastone computer memory operably connectable to the at least one processorand storing instructions that, when executed by the at least oneprocessor, perform operations comprising: generating uplink controlinformation (UCI); transmitting, by the transceiver, more than onephysical uplink shared channels (PUSCHs), wherein based on physicaluplink control channel (PUCCH) resources of a first PUCCH notoverlapping in time with the more than one PUSCHs, the UCI istransmitted through the first PUCCH, and wherein based on the PUCCHresources of the first PUCCH overlapping in time with the more than onePUSCHs, the UCI is transmitted by the transceiver, through only apredefined N^(th) PUSCH among the more than one PUSCHs; determining thatat least one sounding reference signal (SRS) symbol, among a pluralityof symbols to be used for transmitting the SRS, overlaps in time with atleast one PUCCH symbol to be used for transmitting a second PUCCH; andbased on the at least one SRS symbol overlapping in time with the atleast one PUCCH symbol: based on the SRS being a periodic SRS, and basedon the second PUCCH being configured to carry channel state information(CSI): (i) dropping, among the plurality of symbols to be used fortransmitting the SRS, only the at least one SRS symbol that overlapswith the at least one PUCCH symbol, and (ii) transmitting the SRSthrough at least one symbol, among the plurality of symbols, excludingthe at least one SRS symbol; and based on the SRS being an aperiodicSRS, and based on the second PUCCH being configured to carry periodicCSI: not transmitting the second PUCCH.
 9. The UE of claim 8, whereinthe N^(th) PUSCH is predefined at a fixed N^(th) position among the morethan one PUSCHs that are transmitted by the UE.
 10. The UE of claim 8,wherein the UCI comprises at least one of (i) Hybrid Automatic Repeatand request (HARQ) acknowledgement/negative-acknowledgement (ACK/NACK)or (ii) channel state information (CSI).
 11. The UE of claim 8, whereinthe UE supports a transmission of a PUCCH over one slot or multipleslots.
 12. The UE of claim 8, wherein the UE supports a transmission ofa PUSCH over one slot or multiple slots.
 13. The UE of claim 8, whereinthe UE transmits a PUCCH carrying UCI using at least one symbol.
 14. TheUE of claim 8, wherein priorities for setting a transient period isdefined in order of (i) a short PUCCH comprising 1 or 2 symbols, (ii) asounding reference signal (SRS), (iii) a long PUCCH comprising 4-14symbols, and (iv) PUSCH.
 15. The UE of claim 8, wherein the UE is incommunication with at least one of (i) a mobile terminal, (ii) anetwork, (iii) or autonomous vehicles other than the UE.
 16. The methodof claim 1, wherein based on the SRS being the aperiodic SRS, and basedon the second PUCCH being configured to carry the periodic CSI: the SRSis transmitted through at least one symbol among the plurality ofsymbols to be used for transmitting the SRS.
 17. The UE of claim 8,wherein based on the SRS being the aperiodic SRS, and based on thesecond PUCCH being configured to carry the periodic CSI: the SRS istransmitted through at least one symbol among the plurality of symbolsto be used for transmitting the SRS.
 18. An apparatus configured tocontrol a wireless communication device to operate in a wirelesscommunication system, the apparatus comprising: at least one processor;and at least one computer memory operably connectable to the at leastone processor and storing instructions that, when executed by the atleast one processor, perform operations comprising: generating uplinkcontrol information (UCI); transmitting more than one physical uplinkshared channels (PUSCHs), wherein based on physical uplink controlchannel (PUCCH) resources of a first PUCCH not overlapping in time withthe more than one PUSCHs, the UCI is transmitted through the firstPUCCH, and wherein based on the PUCCH resources of the first PUCCHoverlapping in time with the more than one PUSCHs, the UCI istransmitted through only a predefined N^(th) PUSCH among the more thanone PUSCHs; determining that at least one sounding reference signal(SRS) symbol, among a plurality of symbols to be used for transmittingthe SRS, overlaps in time with at least one PUCCH symbol to be used fortransmitting a second PUCCH; and based on the at least one SRS symboloverlapping in time with the at least one PUCCH symbol: based on the SRSbeing a periodic SRS, and based on the second PUCCH being configured tocarry channel state information (CSI): (i) dropping, among the pluralityof symbols to be used for transmitting the SRS, only the at least oneSRS symbol that overlaps with the at least one PUCCH symbol, and (ii)transmitting the SRS through at least one symbol, among the plurality ofsymbols, excluding the at least one SRS symbol; and based on the SRSbeing an aperiodic SRS, and based on the second PUCCH being configuredto carry periodic CSI: not transmitting the second PUCCH.